The Hawaiian Silversword, Argyroxiphium sandwicense, is a remarkable and iconic plant endemic to the volcanic slopes of Hawaii.
Characterized by its striking silver-colored leaves that form a dense rosette, this plant belongs to the aster family (Asteraceae).
Endowed with adaptability to harsh alpine conditions, the Hawaiian Silversword thrives in high-altitude volcanic habitats, particularly on the slopes of Haleakalā on Maui and Mauna Kea on the Big Island.
The silvery appearance is attributed to fine hairs covering the leaves, serving as a protective adaptation against intense sunlight and temperature fluctuations.
The plant has a captivating life cycle, typically spanning several decades. It undergoes a single reproductive event, producing a towering flowering stalk adorned with brilliant purple flowers.
This extraordinary plant faces the challenges of habitat degradation and invasive species, making conservation efforts crucial to its survival and the preservation of Hawaii’s unique ecosystems.
About The Author
John Bagnasco has been in the gardening industry for over 50 years, starting with a horticulture degree from Michigan State University and following a stint at Frank’s Nursery and Crafts in Detroit.
After publishing his first book “Plants for the Home Vol. I” in 1976, he moved to California to become regional manager and buyer for the Nurseryland division of Sunbelt Nursery Group.
He then became the head buyer for Armstrong Garden Centers based in Glendora, California. John had a part-time affiliation with Creative Promotions for ten years before joining them full-time in October 2000 as a senior editor and radio personality for Garden Compass.
John has also taught horticulture classes at Palomar College and San Diego State University.
He is the host of the DVD “The Essential Guide to Roses,” which also features Bryan Main and Bruce and Sharon Asakawa.
His most recent book is “Planting Designs for Cacti and Succulents”.
Currently, John is a co-host on “Garden America,” an interactive live gardening show that additionally provides podcasts of the broadcasts accessible on all major platforms.
You can contact John here.